Fuel-supply means for internal-combustion engines



Aug. 12 1924. 1,504,642

J. M. NELSON FUEL SUPPLY MEANS FOR INTERNAL COMBUSTION ENGINES Filed Jan. '7, 1922 2 Sheets-Sheet 1 (1 Roman,

Aug 12, 1924;

J. M. NELSON FUEL SUPPLY MEANS FORjNTERNA L COMBUSTION ENGINES Filed Jan. '7, 1922 2 Sheets-Sheet 2 3] wvento'z Welsan Patented Aug. 12, 1924.

JULIUS MARION NELSON, OF TULSA, OKLAHOMA.

FUEL-SUPPLY MEANS FOR INTERNAL-COMBUSTION ENGINES.

Application filed January 7, 19-22. Serial No. 527,704.

To all whom it may concern:

Be it known that I, JULIUS M. NELsoN, a citizen of the United States, residing at Tulsa, in the county of Tulsa and State of Oklahoma, have invented certain new and useful Improvements in F uel-Supply Means for Internal-Combustion Engines, of which the following is a specification, reference being had to the accompanyin drawin s.

.This invention relates to fuel supp y means for internal combustion engines, and an important object of the invention is to provide'means for supplying to the engine a dry gas.

A further object of the invention is to provide an attachment for internal combustion engines embodying the usual carbureter whereby the carbureter may be employed in starting the enginev and subsequently employed to control the mixture fed to the engine, the fuel of the mixture being taken from a separate source.

A further object of the invention is to provide a device of this character which is simple in construction and operation and which may be attached to the engine with a minimum change in the construction thereof.

Otherobjects and advantages of the invention will become apparent throughout the course of the followin description.

In the accompanying for the purpose of illustration is shown a preferred embodiment of my invention and wherein like reference characters designate I like parts throughout,

Figure 1 is a diagrammatic view show ing a fueling system constructed in accordance with my invention;

Figure 2 is an enlarged side elevation partially in section, parts being broken away showing the manner of connecting the charge control valve with the throttle opcrating mechanism of the ordinary carburetor;

Figure 3 is a longitudinal sectional view taken through the piston valve showing the piston in the cut off position;

Figure 4 is a similar view showing the piston in the open position; and

Figure 5 is a fra entary sectional View of the charge forming device.

Referring now more particularly to the drawings, the numeral 10 indicates the intake manifold of an engine, 11 the usual rawings wherein carburetor connected with the manifold, 12 the gasoline feed line to the carbureter, 13 the exhaust manifold and 14 the exhaust p1pe.

In accordance with my invention I provide a fuel storage tank 15 in the nature of an auxiliary tank and having at the upper side thereof an auxiliary chamber 16 provided with a fillercap 16 by means of which gasoline may be introduced to the tank 15, the wall of the tank 15 between the auxiliary chamber 16 and the tank At the bottom of the tank 15 a gasoline line 18 is connected having a coil 19 which surrounds the exhaust pipe 14 and which terminates in a lead entering the auxiliary chamber 16 at the top thereof.

A second coil 20 is provided of considerable size and open at one end to the air, the other end extending to a point above the level of the gasoline in the tank 15, as indicated at 21. Within the tank 15, at the bottom thereof, a perforated pipe 22 is disposed and this pipe is connected with the coil 20 by a check valve 23 opening toward the tank.

The numeral 24 designates a cylinder having one end closed, as indicated at 25, and the other end open, as indicated at 26, the open end of this cylinder being closed by a packing nut' 27. In the side walls of the cylinder, at opposed points, are openings 28 receiving nipples 293.11d30. Within the cylinder is arranged a piston valve 31 havproper. being perforated, as indicated at 17.

ing an opening 32 adapted to align with the openings 28 when the piston is in one position. The cylinder is of sufiicient length to permit shifting of the piston to close communication between the openings 28 when desired. The piston may be operated extcriorly of the casing b means of a stem 33 extending through the packing nut 27. 1

In the use of my invention one of the nipples 29 or 30, for example the nipple 30, is engaged in a prepared opening in the intake manifold 10 and the other of the nipples is connected by a conduit 34 having a valve '34" therein with the interior of the auxiliary chamber 16. To the throttle lever 35 which is connected with the butterfly valve 37 of the carburetor by the usual link 36 I secure a second link 38 and pivotally connect the free end of this link with the valve stem 33 of the piston valve. This connection is made in such a manner that the piston valve moves a relatively small distance in comparison with the movement of the butterfly arm of the carbureter, the adjustment being such that the piston Valve is completely closed when the carbureter is completely closed and completely open when the carbureter is completely open.

In the operation of the device the engine is first started and run' with the valve 34 in the line 34 closed. After the engine is heated up the control valve 12 in the gasoline line 12 to the carbureter is closedand the valve 3 lopened. The gasoline in the carbureter becoming exhausted, the entire as supply is drawn from the chamber 16. ince the air drawn through the conduit 34 has been preheated by its passage around the exhaust pipe and since heated gasoline vapors are present in. the chamber 16 due to the arrangement ofthe coil about the ,exhaust'pipe, a substantially dry gas which is very rich will be drawn into the intake manifold through the piston valve, Since the piston valve is opened in proportion to the throttle valve of the carbureter, an ideal mixture, in so far as is possible without the use of complicated adjustments, is drawn into the engine. When the throttle is nearly closed the vacuum created within the intake manifold is much higher and a larger quantity. of gas is drawn from the chamber 16 enriching the mixture. As the throttle is opened and speed increased, the vacuum lessens and less gasis drawn into the intake manifold giving a lean mixture. Since this gas is very dry and to a great degree free from moist particles, the loss in efficiency in the engine'due t0 dilution is lessened and the likelihood of the formation of carbon is likewise lessened. Furthermore, a dry charge explodes much more completely than the ordinary saturated charge drawn from the carbureter affording a large percentage of pureloss. In order to prevent back firing of the engine through the conduit 34, a check valve 39 may be employed which opens toward the intake manifold 10.

From the foregoin it is believed to be obvious that my fue supply system may be readily attached to any of the standard makes of engines without materiall altering "the construction thereof and t at the device when attached will increase the efficiency of the engine and effect a savin in the use of both fuel and oil. It will rthermore be obvious that many changes are possible in the shape, size and arrangement of the various parts herein shown without in any manner departing from the spirit of my invention and I accordingly do not limit myself to the specific structure thereof, except as hereinafter claimed.

I claim:

.1. The method of fueling internal combustion engines consisting in employing the usual carbureter and intake manifold and in addition employing means for forming a highly charged fuel gas, starting the engine employing the charge formed by the carbureter, cutting off the supply of fuel to the carbureter, admitting the fuel gas directly to the manifold and controlling the supply of air for admixture with said fuel gas by the throttle valve of the carbureter.

2. The method of fueling internal combustion engines consisting in employing the usual carbureter and intake manifold and in addition employing means rendercdmperative by the operation of the engine for forming'a highly charged fuel gas, starting the engine employing the charge formed by the carbureter, cutting off the supply of fuel to the carbureter, admitting the fuel gas directly to the manifold and controlling the supply of air for admixture with said fuel gas by the throttle valve of the carbureter.

In testimony whereof I hereunto aflix my signature.

JULIUS MARION NELSON. 

